Hi,
I believe based on the Kittycats page on breeding confettis that has charts (yay!), that
all offspring that show a cocoberry fur also hide a colored berry fur and have a total of 4 furs, so they are valuable for their hidden colored fur. So I am hoarding all my offspring Kay lol
http://kittycats.biz/help/article.php?id=63
On this page there is also a chart, that shows breeding 2 starter confetti cats together and their colored fur offspring with 4 furs, and a "dud" offspring showing a normal fur with 2 furs only.
Somewhere there is also an extensive post by Fabao with an analysis with math and statistics, and Tad weighed in too, but it is too early in the morning for me to understand math...or even find the post.